Door-controlling device.



E. W Y LDE & 0. SGHENOK. DOOR CONTROLLING DEVICE.

APPLICATION FILED MINI-120, 1913.

Patented July 28,1914.

3 SHEETS-SHEBT 1 E. WYLDE & O. SCHENCK.

DOOR CONTROLLING DEVICE.

APPLIOATiON FILED JUNE 20, 1913.

Patented July 28, 1914.

3 SHEETS-SHEET 2.

%uen/or6 E war 7 E. WYLDE & G. SGHENCK.

DOOR CONTROLLING DEVICE.

APPLICATION FILED JUNI120,1913.

1 105,053, Patented July 28.1914

3 SHEETS-SHEET a.

UNITED strhcrnsgrhrnnronnrcn.

EDWARD WYLDE, OF NEW YORK, N. 21, AND (EBA-REES SGK ENCIL- OF @FHIJCLGOg HULL" NOIS, ASSIGNOBS TO ELEVATOR SUPPLY &- REFAiIR-COMPANY, A. CORBORACBION' OF ILLINOIS.

noon-coivmnonma DEVICE.

To all whom it may-concern: I

Be it known that we, EnwAimWYnDE and invented certain new and useful Improve-- ments in Door-Controlling Devices, of which the following is a clear, full", and exact description.

This invention relates to passenger elevators. In operating" high-speed elevators it is desirable Jo-safeguard the passengers;

against injury and also to save as much time as possible at the floors Elevator doorsare frequently provided with safety attachments intended to prevent the starting of the car until thedoor is closed.

Such devices are valuable but necessitate a;

loss of time.

One of the-objects of the present invention is" to provide asafety device which will give great safety but which will result in saving time at the floors Our-invention= will be set forth, inthe claims. g

In the preferred embodiment of our invention shown in the drawings, Figure 1 is a side elevation of a portion'of the mechanism; Fig. 2 is a diagrammatic view of a is combined with an elevat0r;-Fig; 3' is a detail view'of the dashot; Fig. 4 is a de tail, and Figs. 5-, 6 and are modifications.

96 l is'a door or gate which, in the-present embodiment, is horizontally slid'able and is located, for example" at one'of the-floors and 1 allows access to the elevator-'2' moving up and down in the well or hatchway of a building;

In the embodiment shown in the draw- .ingmeans' for t e door which, as illustrated,

- comprises a toggle consisting of levers 3 and 4; pivoted together at 5. Lever 3- is whichgl'ever is pivoted on a fixed stud 10 carried by thedoor. It will'be obvious that when-the door" is open, as illustrated in dotted lines, the movement of the toggle Y will'ca'u'se the-door to close; and conversely the movement of lever 9't'oward tlieri'ght-will v Specification of Letters I'atent. A ine-meanwhile 20, ms;- Serial No.=7fl4',798l I preferred formof circuit which may beused when the door-controlling construction firovided an automatic clos PatentedJun?28,4914,r

break the toggle and open the door: The toggle and levers described may therefore-- he considered tobeeither'a means foropen- In order to pneventanunauthorized openm movement of thedoor" when the same has been partially closed, we have provided tWO pa/I tS:fI' eely movable past; each other durmg the closmgmove'ment'; but adapted automatically to engage on a reverse move ment. In the preferred embodiment shown in F ig. 1- oft-hedrawings, one ofthes'e parts isa grooved wheel-I1 normally fixed on the stud 10 by thelhele-nuts 12 and 13, which also allow the Wheelto be adjusted if de sired. The orherpa'rt of the lockingdevi ee ,is', in this embodiment, a cam 14 pivoted at 15 t0 the level 9. Connected to this cam is a: sliding rod 16* carrying coil sprin 17 whie normally presses the rod an cam toward the wheel; 1 8' is one means ofmoving. the cam which, in the res 'ent embodiment, is} a handle.

It will be obvious 'thac-.when=-'=the door" moving" to the left 'initselesing movement, the grooved wheel 11 and the c'aml Will move freely'past each other" ("except of course for the slight friction between the two; which is inconsiderable), but at an intermediate?- point in the" travel of the door the cam will pass the point 20 and their any attempted movement of the door in the" reversedire'c tion' will causethe \l shaped portion" cf-the com to engage the gro'ovein' the wheel and lock the two together, thereby preventing given a* revers'e movement hr the? opening direction,- the cam 20 will bite against. the surface 21': and prevent thereverse more: men'tof the door: It will be observedthat in'" bothof these locking 'constri ictions il'lils trated; there are two.- parts-which are freely mevabldpest each other d'urin the closing movement cfi the' 'door; but a apt ed auto:-

31 are 1n the electric circult with the conmatically to engage on an attempted reverse movement. Therefore if the elevator operator does not completely close the door, it cannot be opened from the outside of the shaft sufiiciently to allow a person to pass through.

In order to automatically close the door, We have provided a spring-pressed dash-pot 22, the piston of which is connected to the lever 3 of the toggle, so that when the operator releases the handle 18 after having opened the door, the force of the spring 22 will cause the toggle to shut and force the door to its closed position, as illustrated in Fig. l. The toggle slightly passes the dead center in order to lock the door closed and is stopped from further movement by any suitable construction, such as a pin '23 on link 3, which engages a slot 24 on the link 4. In order to cushion the closing move ment, the piston 25 fits closely. in the dashpot casing and forces the air out of a restricted opening 26, thereby giving a well known cushioning efi'ect, which may be varied as desired by a suitable valve 27.

In the operation of high speed elevators in a building, it is important to save all the time possible, and if an operator cannot start his car until the door is entirely closed, much time is lost. It is therefore desirable to prevent the starting of the car until the door is partially closed, but to permit the car to be started before the door is entirely shut. We have provided an electric switch controlled by the door-operating mechanism and which prevents the starting of the elevator until a predetermined point in the closing movement of the door is reached. Such a switch-is illustrated, for example, in Fig. 1 at 29, in which the segments and troller 32 in the car, and with a switch arm 33 bridging the same and operable by suit ablelinks 34, 35 from the ower-operating mechanism. In Fig. 2 we ave shown the same diagrammatically, in which 36 indicates any suitable device for raising and lowering the elevator, such as a motor. .29 is a switch on oneof the floors, and 37 is another similar switch at another fioor operated by the door mechanism on that floor. It will be obvious that when either door is open, its switch is open and the car cannot be started, but as the door closes, the switch arm 33 is thrown to close the circuit. In Figs. 6 and 7 we have shown a modification of such a switch, in which the stationary contact plates 38 and 39 areinthe electrio circuit and are connected by a bridge contact 40.carried on; a vertically movable spring-pressed rod 41. The rod has an ad justable toe 42, which 'is engaged and elevated by a roller 43 when the door is opened and whlch'causes the terminals of the bridge contact to assover onto the dead seg-t ments 44 and 45, thus breaking the circuits as in the other illustrations.

It will be obvious that by the safety-lock arrangement, previously described, the operator may start the car from the floor without waiting for the complete closing of the door, because the door cannot be opened even though it were slightly ajar and with thetoggle somewhat broken. The cushioning efiect of the dash-pot is to cause the door to move somewhat slowly as it approaches the closed position, and as the operator may safely start his car before waiting for the complete closure, a .material amount of time is saved which would otherwise be lost. This is particularly important in the operation of high speed elevators. The value of such a construction will be evident to any person familiar with the practical needs of high speed elevator service. It. is articularly efiective when used in connection with automatically closin doors. With such doors the operator 0 the car need only close the door as far as the safety point, and may then leave the floor with the car. The automatic closing device then completes the closing of the door., I

We are aware that our invention may be embodied in devices widely diifering from those preferred embodiments shown in thepart of the doors closing movement to pre-- vent an opening movement by force applied 'directlyto the.door,.and mechanism auto:

matically throwin sai'd controller to carstartable positionunadvanoe oflthe closed position ofi. the, door, said controller and check mechanism being so arranged that the latter will at least openateat a. plurality of; points after said controller' is thrown.

2. An elevator car ands-mechanism for raising and lowering the same, including a motor, an electric switch icontrolling said motor, a door, check mechanism for the door v automatically operating at several p,Q1I1tS, 1g9 during the latter part of the doors closing.

movement to prevent an opening movement by force applied directl to the door, and mechanism automatically throwing said switch to car-startable position in advance of vthe closed position of the door, said con-, trolling switch and check mechanism being so arranged that the latter will atleast op crate at a plurality of points after said con trolling switch is thrown.

3. An elevator car and mechanism for raising and lowering the same, a controller for said operating mechanism, a door, check mechanism for the door comprising a pawl and a surface engageable thereby, one freely movable across the other by the closing movement of the door, whereby said check mechanism automatically operates at several points during the latter part of. the doors closing movement to prevent an opening movement by force applied directly to the door, said pawl being adapted to automatically move out of engageable checking relation to said surface when the door is completely closed, and mechanism automatically throwing said controller to car-startable position in advance of the closed position of the door, said controller and check mechanism being so arranged that the latter will at least operate at a plurality of points after said controller is thrown.

4. An elevator car and mechanism for raising and lowering the same, a controller for said operatin mechanism, and at each of a plurality of oors a door, check mechanism for the door automatically operatin at several points during the latter part 0? Elle doors closing movement to prevent an opening movement by force applied directly to the door, and mechanism automatically throwing said controller to car-startable position in advance of the closed position of the door, said controller and check mechanism being so arranged that the latter will at least operate at a plurality of points after said controller is thrown.

5. An elevator car and mechanism forraisin and lowering the same, a controller for said operating mechanism, adoor, check mechanism for the door automatically operating at several points during the latter part of the doors closing movement to revent an opening movement by force app ied directly to the door, and mechanism moved by the door and positively connected with said controller and throwing said controller to car-startable position in advance of, the closed position of the door, said controller and check mechanism being so arranged that the latter will at least operate at a plurality of points after said controller is thrown.

6. An elevator car and mechanism for raisin and lowering the same, a controller for said operating mechanism, a door, check mechanism for the door automatically operating at several points during the latter EDWARD WYLDE. Witnesses:

HENRY M. WEISS,

R. S. SCHWARTZ. Signed at Chicago, Illinois, this 16th day of June 1913.

CHARLES SCHENCK. Witnesses F. J. HAMER, A. H. HARVEY. 

